Buggy code:
public < ( fLocationPaths . length ) ; i ++ ) { int startStep = fCurrentStep [ i ] ; fStepIndexes [ i ] . push ( startStep ) ; if ( ( fMatched [ i ] ) || ( ( fNoMatchDepth [ i ] ) > 0 ) ) { ( fNoMatchDepth [ i ] ) ++ ; continue ; } if ( XPathMatcher . DEBUG_STACK ) { System . out . println ( ( ( ( toString ( ) ) + ":<seq2seq4repair_space>" ) + ( fStepIndexes [ i ] ) ) ) ; } XPath [ ] steps = fLocationPaths [ i ] . steps ; while ( ( ( fCurrentStep [ i ] ) < ( steps . length ) ) && ( ( steps [ fCurrentStep [ i ] ] . axis . type ) == ( Axis . SELF ) ) ) { if ( XPathMatcher . DEBUG_MATCH ) { XPath . Step step = steps [ fCurrentStep [ i ] ] ; System . out . println ( ( ( toString ( ) ) + "<seq2seq4repair_space>[SELF]<seq2seq4repair_space>MATCHED!" ) ) ; } ( fCurrentStep [ i ] ) ++ ; } if ( ( fCurrentStep [ i ] ) == ( steps . length ) ) { if ( XPathMatcher . DEBUG_MATCH ) { System . out . println ( ( ( toString ( ) ) + "<seq2seq4repair_space>XPath<seq2seq4repair_space>MATCHED!" ) ) ; } fMatched [ i ] = true ; int j = 0 ; for ( ; ( j < i ) && ( ! ( fMatched [ j ] ) ) ; j ++ ) ; if ( j == i ) fBufferContent = fShouldBufferContent ; continue ; } int descendantStep = fCurrentStep [ i ] ; while ( ( ( fCurrentStep [ i ] ) < ( steps . length ) ) && ( ( steps [ fCurrentStep [ i ] ] . axis . type ) == ( Axis . DESCENDANT ) ) ) { if ( XPathMatcher . DEBUG_MATCH ) { XPath . Step step = steps [ fCurrentStep [ i ] ] ; System . out . println ( ( ( toString ( ) ) + "<seq2seq4repair_space>[DESCENDANT]<seq2seq4repair_space>MATCHED!" ) ) ; } ( fCurrentStep [ i ] ) ++ ; } if ( ( fCurrentStep [ i ] ) == ( steps . length ) ) { if ( XPathMatcher . DEBUG_MATCH ) { System . out . println ( ( ( toString ( ) ) + "<seq2seq4repair_space>XPath<seq2seq4repair_space>DIDN'T<seq2seq4repair_space>MATCH!" ) ) ; } ( fNoMatchDepth [ i ] ) ++ ; if ( XPathMatcher . DEBUG_MATCH ) { System . out . println ( ( ( toString ( ) ) + "<seq2seq4repair_space>[CHILD]<seq2seq4repair_space>after<seq2seq4repair_space>NO<seq2seq4repair_space>MATCH" ) ) ; } continue ; } if ( ( ( ( fCurrentStep [ i ] ) == startStep ) || ( ( fCurrentStep [ i ] ) > descendantStep ) ) && ( ( steps [ fCurrentStep [ i ] ] . axis . type ) == ( Axis . CHILD ) ) ) { XPath . Step step = steps [ fCurrentStep [ i ] ] ; XPath . NodeTest nodeTest = step . nodeTest ; if ( XPathMatcher . DEBUG_MATCH ) { System . out . println ( ( ( toString ( ) ) + "<seq2seq4repair_space>[CHILD]<seq2seq4repair_space>before" ) ) ; } if ( ( nodeTest . type ) == ( NodeTest . QNAME ) ) { if ( ! ( nodeTest . name . equals ( element ) ) ) { if ( ( fCurrentStep [ i ] ) > descendantStep ) { fCurrentStep [ i ] = descendantStep ; continue ; } ( fNoMatchDepth [ i ] ) ++ ; if ( XPathMatcher . DEBUG_MATCH ) { System . out . println ( ( ( toString ( ) ) + "<seq2seq4repair_space>[CHILD]<seq2seq4repair_space>after<seq2seq4repair_space>NO<seq2seq4repair_space>MATCH" ) ) ; } continue ; } } ( fCurrentStep [ i ] ) ++ ; if ( XPathMatcher . DEBUG_MATCH ) { System . out . println ( ( ( toString ( ) ) + "<seq2seq4repair_space>[CHILD]<seq2seq4repair_space>after<seq2seq4repair_space>MATCHED!" ) ) ; } } if ( ( fCurrentStep [ i ] ) == ( steps . length ) ) { fMatched [ i ] = true ; int j = 0 ; for ( ; ( j < i ) && ( ! ( fMatched [ j ] ) ) ; j ++ ) ; if ( j == i ) fBufferContent = fShouldBufferContent ; continue ; } if ( ( ( fCurrentStep [ i ] ) < ( steps . length ) ) && ( ( steps [ fCurrentStep [ i ] ] . axis . type ) == ( Axis . ATTRIBUTE ) ) ) { if ( XPathMatcher . DEBUG_MATCH ) { System . out . println ( ( ( toString ( ) ) + "<seq2seq4repair_space>[ATTRIBUTE]<seq2seq4repair_space>before" ) ) ; } int attrCount = attributes . getLength ( ) ; if ( attrCount > 0 ) { XPath . NodeTest nodeTest = steps [ fCurrentStep [ i ] ] . nodeTest ; QName aname = new QName ( ) ; XSAttributeGroupDecl attrGrp = null ; if ( elementDecl != null ) { XSTypeDecl type = elementDecl . fType ; if ( type != null ) { if ( ( type . getTypeCategory ( ) ) == ( XSTypeDecl . COMPLEX_TYPE ) ) { XSComplexTypeDecl ctype = ( ( XSComplexTypeDecl ) ( type ) ) ; attrGrp = ctype . getAttrGrp ( ) ; } } } for ( int aindex = 0 ; aindex < attrCount ; aindex ++ ) { attributes . getName ( aindex , aname ) ; if ( ( ( nodeTest . type ) != ( NodeTest . QNAME ) ) || ( nodeTest . name . equals ( aname ) ) ) { ( fCurrentStep [ i ] ) ++ ; if ( ( fCurrentStep [ i ] ) == ( steps . length ) ) { fMatched [ i ] = true ; int j = 0 ; for ( ; ( j < i ) && ( ! ( fMatched [ j ] ) ) ; j ++ ) ; if ( j == i ) { String avalue = attributes . getValue ( aindex ) ; fMatchedString = avalue ; XSSimpleType aValidator = null ; if ( attrGrp != null ) { XSAttributeUseImpl tempAttUse = attrGrp . getAttributeUse ( aname . uri , aname . localpart ) ; if ( tempAttUse != null ) { XSAttributeDecl tempAttDecl = tempAttUse . fAttrDecl ; <START_BUG> aValidator = tempAttDecl . fType ; <END_BUG>

Fix:
aValidator = ( ( XSSimpleType ) ( tempAttDecl . getTypeDefinition ( ) ) ) ;